Abstract: A current sensor system has a conductor and a packaged integrated circuit for sensing a current in the conductor. The conductor is external to the packaged integrated circuit. The packaged integrated circuit includes a substrate having an active surface and a back surface; one or more magnetic sensing elements; a processing circuit arranged to process signals received from the one or more magnetic sensing elements to derive an output signal indicative of a sensed current in the conductor; a housing; a plurality of leads; electrical connections between the leads and the active surface. The back surface of the substrate is disposed on a support formed by at least two inner lead portions of the plurality of leads and the active side of the substrate is oriented towards the outer ends of the outer lead portions of the leads in a direction perpendicular to a plane defined by the support.

Abstract: An electrical current sensing arrangement includes a busbar, a dielectric material containing therein a magnetic field sensor, and a ferromagnetic over-mold encapsulating a portion of the busbar and the dielectric material. The dielectric material is disposed against the busbar such that the magnetic field sensor is spaced away from the busbar and the ferromagnetic over-mold is not between the busbar and the magnetic field sensor.

Abstract: An integrated sensor device includes: a semiconductor substrate comprising a horizontal Hall element, and an integrated magnetic flux concentrator located substantially above said horizontal Hall element, wherein the first magnetic flux concentrator has a shape with a geometric center which is aligned with a geometric centre of the horizontal Hall element; and wherein the shape has a height H and a transversal dimension D, wherein H?30 ?m and/or wherein (H/D)?25%. The integrated magnetic flux concentrator may be partially incorporated in the “interconnection stack”. A method is provided for producing such an integrated sensor device.

Abstract: A magnetic resonance device for monitoring growth of tissue in one or more bioreactors. The device can include a first magnet and a second magnet that can form a uniform magnetic field of desired strength around at least one sample of effluent from at least one bioreactor. At the command of a controller, an RF signal can illuminate the at least one magnetized sample, and sensors can detect at least one echo signal from the at least one magnetized sample. The controller can characterize the at least one sample based on the at least one echo signal. A resonator can shape the at least one echo signal.

Abstract: A current sensing circuit includes a filtering circuit, an amplifier, a first resistor, a first transistor and a second transistor. The filtering circuit is coupled to two terminals of a sensing resistor. The amplifier has a first input terminal, a second input terminal and an output terminal. The second input terminal is coupled to the filtering circuit. The first resistor is coupled between the filtering circuit and the first input terminal of amplifier. A control terminal of the first transistor is coupled to the output terminal of amplifier, and its first terminal is coupled to the first input terminal of amplifier and its second terminal is grounded through a second resistor. A control terminal of the second transistor is coupled to the output terminal of amplifier, and its first terminal is coupled to the second input terminal of amplifier and its second terminal is grounded through a third resistor.

Abstract: Optical fiber-based measuring equipment for measuring the current circulating through at least one conductor. The measuring equipment includes an interrogator and a sensing portion connected to the interrogator and configured for being arranged in the proximity of the conductor. The sensing portion includes a first input branch and a second input branch coupled by means of a splitter to a first sensing branch and to a second sensing branch. The first sensing branch includes a first optical fiber winding arranged in the proximity of the conductor, and the second sensing branch includes a second optical fiber winding arranged in the proximity of the conductor, the first optical fiber winding and the second optical fiber winding having the same number of turns that are, however, wound in opposite directions.

Abstract: A full-polarization Faraday magnetic field sensor based on a Sagnac interference system and a modulation method are provided. The full-polarization Faraday magnetic field sensor includes a light source, an optical fiber coupler, a polarizer, a polarization beam splitter, a polarization controller, a magnetic field sensing unit, a detector and a polarization maintaining optical fiber. An optical signal is emitted by the light source, passes through the optical fiber coupler and the polarizer in sequence, and is divided into a clockwise path and an anticlockwise path by the polarization beam splitter. Angles between fast axis directions of the two polarization maintaining optical fiber loops and a polarization direction of the polarizer are respectively clockwise 45° and anticlockwise 45°. The two polarization maintaining optical fiber loops has opposite winding directions, a same diameter, and a same number of winding turns.

Abstract: The invention relates to an electrical device comprising a support comprising a holding member, and an electrical circuit (12) housed at least partially in the support and comprising an array of electrical tracks (122) and a receiving portion (121) designed to receive a magnetic field sensor. The electrical circuit (12) is configured so as to create an electrical link between the magnetic field sensor, on the one hand, and an electronic board external to the electrical device, on the other hand. The holding member comprises at least one bearing portion forming a stop so as to create a mechanical link between the support and the electronic board. Said receiving portion (121) forms an exposed surface configured so as to create an electrical connection with said magnetic field sensor through plane-to-plane contact between the receiving portion (121) and a face of the magnetic field sensor.

Abstract: A sensor device is provided for measuring current in an electrical circuit of a PCB, including a coaxial connector mounted on a tab in the PCB having an inner conductor and a concentric outer conductor, where the tab is formed by a gap through the PCB along a portion of a perimeter surrounding the coaxial connector; a sidewall conductor formed on sidewalls of the tab and connected to ground plane; and resistors mounted on the PCB and arranged along the portion of the perimeter surrounding the coaxial connector, each resistor being connected between the inner conductor and the sidewall conductor. Current from the electrical circuit flows in a first direction through the ground plane creating a first magnetic field, and flows in a second direction between the sidewall conductor and the inner conductor through the resistors creating a second magnetic field, where the first and second magnetic field partially cancel.

Abstract: A microelectronic device has a Hall sensor that includes a Hall plate in a semiconductor material. The Hall sensor includes contact regions in the semiconductor material, contacting the Hall plate. The Hall sensor includes an isolation structure with a dielectric material contacting the semiconductor material, on at least two opposite sides of each of the contact regions. The isolation structure is laterally separated from the contact regions by gaps. The Hall sensor further includes a conductive spacer over the gaps, the conductive spacer being separated from the semiconductor material by an insulating layer.

Abstract: A method of producing a semiconductor substrate comprising at least one integrated magnetic flux concentrator, comprising the steps of: a) providing a semiconductor substrate having an upper surface; b) making at least one cavity in said upper surface; c) depositing one or more layers of one or more materials, including sputtering at least one layer of a soft magnetic material; d) removing substantially all of the soft magnetic material that is situated outside of the at least one cavity, while leaving at least a portion of the soft magnetic material that is inside said at least one cavity. A semiconductor substrate comprising at least one integrated magnetic flux concentrator. A sensor device or a sensor system, a current sensor device or system, a position sensor device or system, a proximity sensor device or system, an integrated transformer device or system.

Abstract: A mobile device for measuring radon in groundwater is proposed. The mobile device for measuring radon in groundwater has an effect in that the mobile device enables a user to achieve the same level of reliability as the conventional technology, a previously applied separate dehumidifying device is not required in measuring the radon concentration in groundwater, and while moving from site to site, the user is able to quickly measure the radon concentration in groundwater by the mobile device with a simple configuration and low cost.

Abstract: A current sensor IC includes a unitary lead frame having a primary conductor with a first thickness and a secondary lead having a second thickness less than the first thickness. A semiconductor die adjacent to the primary conductor includes a magnetic field sensing circuit to sense a magnetic field associated with the current and generate a secondary signal indicative of the current. An insulation structure is disposed between the primary conductor and the die. A mold material encloses a first portion of the secondary lead and a second portion of the secondary lead that is exposed outside of the package has the second thickness.

Abstract: A current transformer assembly includes a first current transformer, a plug, a first wire and a second wire between the plug and the first current transformer adapted to transmit a measurement of the first current transformer; and a memory chip adapted to store a first scale factor of the first current transformer.

Abstract: A current measurement circuit, for wireless charging systems, for instance, comprises a differential input configured to have applied an input voltage sensed across a shunt resistor traversed by a current to be measured, a voltage reversal switch arrangement selectively switchable to reverse the polarity of the input voltage as applied between a first and a second voltage sensing nodes as well as a first and a second current flow line between the voltage sensing nodes and ground. A difference resistor intermediate the two current flow lines is traversed by a current which is a function of the input voltage as applied to the first and second sensing nodes via the voltage reversal switch arrangement. First and second current sensing nodes at the two current flow lines are coupled to a differential current output via a current reversal switch arrangement selectively switchable to reverse the output current polarity.

Abstract: Techniques are described for calibrating sensors for use in systems in the presence of offset. Sensors may be used to generate sense signals which represent true signals that are part of a system. When the sensors are not calibrated, inefficiency due to offset can be introduced into a system that incorporates the generated sense signal. Flipping techniques may be used to mitigate offset. Applicant has appreciated that when the sensor gains are mismatched, the offset calibration associated with a sensor is not independent from the offset calibration associated with the other sensors. Some of the flipping techniques described herein account for gain mismatch by flipping the polarity of each sensor in a one-at-a-time fashion, and by combining the results in a common system of equations to determine the gain mismatch and the offset of each sensor.

Abstract: A measurement circuit comprises an input terminal to receive a current signal, a first circuit branch coupled to the first terminal and including one or more circuit elements to receive a portion of the current signal, a second circuit branch coupled to the first terminal and including one or more additional circuit elements to receive another portion of the current signal, a nonlinear circuit element coupling the first circuit branch to the second circuit branch, and a quantization circuit configured to produce an input current measurement of current in the first and second circuit branches, and to include current in the second circuit branch in the input current measurement according to a magnitude of the input current signal.

Abstract: A current sensor arrangement for measuring an AC electrical current, comprising: an electrical conductor having three transverse rectangular cut-outs; a sensor device comprising two sensor elements spaced apart along a first direction for measuring two magnetic field components oriented in said first direction, and configured for determining a magnetic field difference or magnetic field gradient, and for determining the AC current based on said difference or gradient. The sensor device is positioned at a particular location relative to the second cut-out, such that the magnetic field difference or gradient is substantially proportional to the AC current for frequencies from 100 Hz to 2 kHz. A current sensor system. A method of measuring an AC current with improved accuracy.

Abstract: Disclosed herein is a method of detecting a material response. The method includes providing an oscillating primary magnetic field to cause as ample to produce a secondary magnetic field. The method also includes reducing the effect on an atomic magnetometer of components of the primary and secondary magnetic fields in a direction substantially orthogonal to a surface of the sample. The method also includes detecting the secondary magnetic field with the atomic magnetometer to detect the material response.

Abstract: A strain engineered material including a monolayer graphene sheet comprising an array of wrinkles induced by deformations in the graphene sheet, the deformations formed by a lattice of underlying nanostructures on a substrate. The lattice of nanostructures comprises rows of the nanostructures and each of the wrinkles comprise a ridge aligned on top of a different one of the rows and along an alignment direction defined by the rows. The deformations pattern a strain distribution in the graphene sheet that induces a periodically varying pseudo magnetic field distribution ranging between a positive value and a negative values. The periodically varying pseudo magnetic field distribution has field magnitude minima located parallel to and between the ridges and field magnitude maxima located near to and parallel to each of the ridges and can be designed for various valleytronic and spintronic device applications.